Ralph is looking at a blood vessel under a microscope as part of his study about the cardiovascular system. He notices that the vessel contains blood and has valves. What is the blood vessel that he is - QAmmunity.org

Ralph is looking at a blood vessel under a microscope as part of his study about the cardiovascular system. He notices that the vessel contains blood and has valves. What is the blood vessel that he is

asked Sep 1, 2021 202k views

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